Which of the following statements about the effect of surface -zk:vt4pv z c+area and volume on the cell’s pr-p:vcz 4z +vtkocesses is false?

  Which statement best descr(,mkdif4in6fg*vbu + ibes stem cells?

  Which is a correct description of the cell type adapted 4n ,m. wov+jlikr;d 3tfor gas exchange in the lungs?34v r.o kw+tml;djn ,i

  Which of the following explai2 n)up.,l3(fm3z)a f ufuiagyns the limitations on cell size?

  What is this cell's most likely pr99a am1aw v*8 xlgs+mgimary function, and where could it be located *9wga 9xamg+ savl81 min a mammal?

  Which of the following characteristics of type I pneumwlyoflb a;, az*qz -3+ocytes contribute to increasing the rate of gas exchanyaao +lb * 3z,-fzqw;lge?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bonya*lsb7k-iyr4s +vug8zp.n . -xbl r6e marrow transplant from a 36 year old. One of the functions of these cells isr. syb yv 8-il.apnrbl s*gz+7-4uxk6 to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and striawt ec+w*+qvi2 ted muscle fibe+vq* w+c t2iwres?

Below is a diagram of a motor neuron. Neurons are the longest eeo:jtfb94bo ) o08ea cells in the human bo0 :9eooejbt8a)b4 efody.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infant rx)(he9jysq* b06d :3kvix 8pegiy y.vespiratory distress syndrome, which could be caused by a lack of sufficient surfactant in yy vdpv)j 6 e(s*xgb:3k hx98 0.iqiyethe pulmonary alveoli. The diagram below shows two different alveoli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a9oj,+x(r5+iu x-nnyhxmj gea ga 9/h1 reason that embryonic stem cells are not used in the treatmenr gn xyh59 +ma,ux jo+i1a9-nejxg/h(t of leukaemia?

  The table shows the diameters of ,*cl-9nbdz e qi/ai;;d cz:xz red blood cells from different organisms. Which r /,;ie* zib 9dlnz;cz-c:qxda ed blood cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proxi0af ol9pghb9y9 g) cm5mal convoluted tubule make these cells more adapted to the function9m )0p gcloyf95ag9hbs they perform.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryonic stem cells and , v/(nifvzk j6vgf d2,specialised cells is/are not true? ,6v/nfkzvj (fd2gi v,

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of the following is *0sanf/ bdz u;x;yj4kdf j47cw b+4utthe correct order from smallest to largest?4uy; fj /d4n+ dkjbtaf4cwbsz* u70x;

  Which row in the following table gives the correct disadvant c,.bc*sy w:1k:fr mceu(yc:o ages of the different stem cell sources for therapeutico.:m ccy *fs,uke(ywr1:cbc: uses?

1.Describe how the use of stem cells may be used to treat ty zlf1;r*,rrv/; nwdjvpe I diabetes in the futurr;/jf*wl,r zvvn; r1d e.

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of specialised cells (not to l ri4;cwew6p qb1- b, 9l)mcwuscale).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.